<template>
  <div class="xtx-cart-page">
    <div class="container m-top-20">
      <div class="cart">
        <table>
          <thead>
            <tr>
              <th width="120">
                <XtxCheckbox :model-value="isAll" @change="allCheck"
                  >全选</XtxCheckbox
                >
                </th>
              <th width="400">商品信息</th>
              <th width="220">单价</th>
              <th width="180">数量</th>
              <th width="180">小计</th>
              <th width="140">操作</th>
            </tr>
          </thead>
          <!-- 有效商品 -->
          <tbody>
            <tr v-for="i in cartList" :key="i.id">
              <!-- 单选框 -->
              <!--
                原因：
                通过v-model双向绑定 vuex中的数据
                v-model 第三步 事件被你触发时 直接把事件参数赋值给v-model绑定的数据
                当你用v-model 事件参数 会绕过mutation函数 直接对vuex中的数据进行修改

                解决：
                核心思路：不用v-model不就可以了 v-model 对传统父子通信手段的一次封装
                回归到传到的父子通信手段 实现当前的功能

               -->
              <td>
                <XtxCheckbox
                  :model-value="i.selected"
                  @change="(selected) => checkChange(i, selected)"
                />
              </td>
              <td>
                <div class="goods">
                    <RouterLink to="/"
                    ><img :src="i.picture" alt=""
                  /></RouterLink>
                  <div>
                    <p class="name ellipsis">{{i.name}}</p>
                    <!-- 选择规格组件 -->
                  </div>
                </div>
              </td>
              <td class="tc">
                  <p>&yen;{{ i.price }}</p>
                <p>
                  比加入时降价
                  <span class="red"
                    >&yen;{{ i.price - i.nowOriginalPrice }}</span
                  >
                </p>
              </td>
              <td class="tc">
                <!-- 数量组件 -->
                 <XtxNumBox
                  :is-label="false"
                  :model-value="i.count"
                  @change="(count) => countChange(i, count)"
                />
              </td>
              <td class="tc">
                <p class="f16 red">&yen;{{ i.count * i.price }}</p>
              </td>
              <td class="tc">
                <p><a class="green" href="javascript:;">删除</a></p>
              </td>
            </tr>
          </tbody>
        </table>
      </div>
      <!-- 操作栏 -->
      <div class="action">
        <div class="batch">
           共 {{ allCount }} 件商品，已选择 {{ selectedCount }} 件，商品合计：
          <span class="red">¥{{ selectedPrice }}</span>
        </div>
        <div class="total">
            <XtxButton type="primary" @click="goSettle">下单结算</XtxButton>
        </div>
      </div>
    </div>
  </div>
</template>
<script>import { computed } from 'vue'
import { useStore } from 'vuex'
import Message from '@/components/Message'
import router from '@/router'
export default {
  name: 'XtxCartPage',
  setup () {
    const store = useStore()
    const cartList = computed(() => store.state.cart.cartList)
    const isAll = computed(() => store.getters['cart/isAll'])
    const allCount = computed(() => store.getters['cart/allCount'])
    const selectedCount = computed(() => store.getters['cart/selectedCount'])
    const selectedPrice = computed(() => store.getters['cart/selectedPrice'])

    // 单选切换
    function checkChange (curItem, selected) {
      console.log(curItem, selected)
      // 把最新的状态通过走mutation函数 对vuex中的state中对应的数据进行修改
      // 需要找到对应的项然后进行修改？当事件触发时除了需要拿到最新的选中状态
      // 还需要一个用来识别要修改谁的数据 curItem -> skuId  selected
      store.dispatch('cart/singleCheck', {
        skuId: curItem.skuId,
        count: curItem.count,
        selected
      })
    }
    // 增加数量
    function countChange (curItem, count) {
      store.dispatch('cart/countChange', {
        skuId: curItem.skuId,
        count,
        selected: curItem.selected
      })
    }
    // 全选
    function allCheck (selected) {
      store.dispatch('cart/allCheck', selected)
    }
    // 下单结算
    function goSettle () {
      if (selectedCount.value === 0) {
        return Message({ text: '请至少选择一项', type: 'warn' })
      } else {
        router.push('/settle')
      }
    }
    return {
      cartList,
      checkChange,
      allCheck,
      isAll,
      allCount,
      selectedCount,
      selectedPrice,
      goSettle,
      countChange
    }
  }
}
</script>
<style scoped lang="less">
.tc {
  text-align: center;
  .xtx-numbox {
    margin: 0 auto;
    width: 120px;
  }
}
.red {
  color: @priceColor;
}
.green {
  color: @xtxColor
}
.f16 {
  font-size: 16px;
}
.goods {
  display: flex;
  align-items: center;
  img {
    width: 100px;
    height: 100px;
  }
  > div {
    width: 280px;
    font-size: 16px;
    padding-left: 10px;
    .attr {
      font-size: 14px;
      color: #999;
    }
  }
}
.action {
  display: flex;
  background: #fff;
  margin-top: 20px;
  height: 80px;
  align-items: center;
  font-size: 16px;
  justify-content: space-between;
  padding: 0 30px;
  .xtx-checkbox {
    color: #999;
  }
  .batch {
    a {
      margin-left: 20px;
    }
  }
  .red {
    font-size: 18px;
    margin-right: 20px;
    font-weight: bold;
  }
}
.tit {
  color: #666;
  font-size: 16px;
  font-weight: normal;
  line-height: 50px;
}
.xtx-cart-page {
  .cart {
    background: #fff;
    color: #666;
    table {
      border-spacing: 0;
      border-collapse: collapse;
      line-height: 24px;
      th,td{
        padding: 10px;
        border-bottom: 1px solid #f5f5f5;
        &:first-child {
          text-align: left;
          padding-left: 30px;
          color: #999;
        }
      }
      th {
        font-size: 16px;
        font-weight: normal;
        line-height: 50px;
      }
    }
  }
}
</style>
